Pump unit



FIG. 1 is a perspective view of a pump unit;

FIG. 2 is a right side view of the pump unit;

FIG. 3 is a left side view of the pump unit;

FIG. 4 is a top plan view of the pump unit;

FIG. 5 is a front elevational view of the pump unit; and,

FIG. 6 is a rear elevational view of the pump unit.

The broken lines in the Figures are for environmental purposes only and form no part of the claimed design. 

CLAIM The ornamental design for a pump unit, as shown and described. 